What is the best way to improve Aperture 3 peformance on an iMac?Instead of disassembling the iMac to install a SSD, you could also use an external Thunderbolt SSD drive to store the Aperture library. The bandwidth is much greater than firewire. It is a bit more expensive however. Separating the drive running the OS and software from where the Aperture library resides will help with performance.